Apple wants the third-party app marketplace for the upcoming Apple Watch to be a hit just like on the iPhone, iPad, and Mac. Apple has begun seeking an “Apple Watch Evangelist,” according to a posting on its official jobs website. This evangelist position is specifically designed to work with third-party application developers and promote development for the upcoming Apple Watch platform:

T-Mobile customers who download the official Major League Baseball app At Bat 13 before June 30th will get free streaming access to the MLB.TV Game of the Day, as well as live & away radio broadcasts and highlights from home & away games around the league … Read more

As we noted in February, “MLB.com At Bat 2012” launched to bring baseball fanatics scores, news, and analysis for free. The app also includes an in-app subscription of $14.99 (or $2.99 a month) that provides in-game audio. However, if you are a huge fan, you can pay the $120 a year subscription for in-game video.

MLB’s Advanced Media office announced today (via GigaOm)that the app reached 3 million downloads just a week into the MLB’s 2012 season. Seeing a ton of success, the 2012 version of the app was the top sports app on both iOS and Android for the past few weeks. There were also 800,000 audio and video live streams combined every day. It took four months for those numbers to be reached last season.

“MLB.com at Bat” is definitely a unique app, providing its fans with fair prices to follow their favorite teams. The NBA also offers a similar app for free with in-app subscription, so you can watch all the league’s games. The MLB and NBA also both have an app available on the Apple TV that allows you to watch games if you pay for each respective subscription.

The new user-interface and in-app purchase model is most likely why the MLB app is off to a great start. Moreover, with 800,000 streams going a day, it looks like a good majority of those 3 million users are paying for the app.